A year without flying

At the UN Climate Change Conference in Paris last December, the 195 participating states agreed on the objective of keeping global warming to well below two degrees Celsius. After this historic breakthrough, it's now time to put these political objectives into action. Global CO₂ emissions must be completely halted within a few decades. [1] If this is to happen, we need radical changes – both large-scale and small-scale – and we need them now. So in that spirit, I have made a resolution: this year I will not fly.

In the maelstrom of globalisation

I got off to a slow start with flying. Before I finished my studies, I’d never even set foot in a plane, nor did I have a driving licence. That was nothing unusual at the time – not for an environmental science student, anyway. Fifteen years later, I have travelled at least ten times around the world for work, I regularly fly to other continents, and I have a driving licence in three different countries. Nowadays that’s nothing unusual either, not even for an environmental scientist.

Since the 1990s, frequent journeys to faraway lands have become somehow commonplace – they are now universally accepted and part of everyday life. Environmental scientists, though, find themselves in a quandary: flying isn’t environmentally friendly, but it’s also the perfect fit for a job where you need to make new discoveries and exchange ideas with like-minded people from different cultures.

A creative challenge

This year, I won't be boarding a single plane. This won’t be easy, as I’ll continue to be responsible for international projects. I've already turned down several lecture invitations and will have to cancel commitments for a number of committees. I'm also mindful of some of the exciting opportunities for new projects in other countries. Without flying, it's hard to see how any of them can happen.

But it's precisely because it's difficult that this interests me. Right now, giving up flying seems like quite an adventure, as exciting as flying itself was in its early days. It’s going to take some innovation – and not just in terms of finding good excuses (not being able to fly because of climate change probably won’t cut it). I’ll also have to find new ways of working. Hopefully people will accept my offers to speak at conferences via Skype. After all, it’s worked in the past. For ETH’s research partnership in the Seychelles [2] we’re working on virtual methods of teaching and working. In this respect, the MIREN [3] international mountain project could serve as a good template. For ten years now, I have coordinated it mostly from home.

A matter of credibility

The Paris conference was a high point for the credibility and symbolic power of environmental science. The international community committed itself to fundamental societal change, even though only a few experts understand the complex climate models involved. People trusted the scientists and their analysis of the problem.

We are now entering a new phase, in which the challenge is no longer to recognise problems, but to solve them. New kinds of credibility and facts will be called for. From now on, scientists will be judged by whether they can answer their own calls for radical solutions. Flying is a good testing ground for this question. It is unlikely that new technologies will make air travel carbon neutral in the next few decades. We cannot allow ourselves to rely on new technologies alone to guide us towards a sustainable society; it will take behavioural changes and social innovations too. [4]

My suggestion: set a maximum for ETH flights